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+ + +

Aztec.nr

+ +

+ Aztec Smart Contract Development Framework +

+ +

+ Build Status + Aztec Website + Discord Chat + License +

+
+ + +# Aztec.nr + +`Aztec-nr` is a [Noir](https://noir-lang.org) framework for contract development on [Aztec](aztec.network). + +### Directory Structure +``` +. +├── aztec // The core of the aztec framework +├── easy-private-state // A library for easily creating private state +├── safe-math // A library for safe arithmetic +└── value-note // A library for storing arbitrary values +``` + +## Installing Aztec-nr libraries + +```toml +[package] +name = "your_contract" +authors = ["you! ;) "] +compiler_version = "" +type = "contract" + +[dependencies] +# To install the aztec framework (required to create aztec contracts). +aztec = { git = "https://github.com/AztecProtocol/aztec-nr", tag = "master" , directory = "aztec" } + +# Optional libraries +easy_private_state = { git = "https://github.com/AztecProtocol/aztec-nr", tag = "master" , directory = "easy-private-state" } +safe_math = { git = "https://github.com/AztecProtocol/aztec-nr", tag = "master" , directory = "safe-math" } +value_note = { git = "https://github.com/AztecProtocol/aztec-nr", tag = "master" , directory = "value-note" } +``` + + +## Prerequisites +To use `Aztec.nr` you must have [Noir](https://noir-lang.org/) installed. Noir is a general purpose programming language for creating zero-knowledge-proofs. `Aztec.nr` supercharges the Noir language with Aztec Smart Contract capabilities. + +### Quick Installation +The fastest way to install is with [noirup](https://noir-lang.org/getting_started/nargo_installation#option-1-noirup). + +To use `Aztec-nr` the `aztec` version of `Noir` is required (Note; this version is temporarily required if you would like to use `#[aztec()]` macros). + +Once noirup is installed, you can run the following: +```bash +noirup -v aztec +``` + +For more installation options, please view [Noir's getting started.](https://noir-lang.org/getting_started/nargo_installation) + diff --git a/assets/Aztec_banner.png b/assets/Aztec_banner.png new file mode 100644 index 0000000..5032029 Binary files /dev/null and b/assets/Aztec_banner.png differ diff --git a/aztec/src/messaging.nr b/aztec/src/messaging.nr index c9ee3be..8f41c29 100644 --- a/aztec/src/messaging.nr +++ b/aztec/src/messaging.nr @@ -1,4 +1,3 @@ -mod get_commitment_getter_data; mod l1_to_l2_message; mod l1_to_l2_message_getter_data; diff --git a/aztec/src/messaging/get_commitment_getter_data.nr b/aztec/src/messaging/get_commitment_getter_data.nr deleted file mode 100644 index 07d826d..0000000 --- a/aztec/src/messaging/get_commitment_getter_data.nr +++ /dev/null @@ -1,15 +0,0 @@ -use crate::oracle::get_commitment::COMMITMENT_GETTER_LENGTH; - -struct CommitmentGetterData { - message: Field, - leaf_index: Field, - root: Field, -} - -fn make_commitment_getter_data(fields: [Field; COMMITMENT_GETTER_LENGTH], start: Field) -> CommitmentGetterData { - CommitmentGetterData { - message: fields[start], - leaf_index: fields[start + 1], - root: fields[start + 2], - } -} \ No newline at end of file diff --git a/aztec/src/note/lifecycle.nr b/aztec/src/note/lifecycle.nr index b6e530e..43ccdfa 100644 --- a/aztec/src/note/lifecycle.nr +++ b/aztec/src/note/lifecycle.nr @@ -50,7 +50,6 @@ fn create_note_hash_from_public( fn destroy_note( context: &mut PrivateContext, - storage_slot: Field, note: Note, note_interface: NoteInterface, ) { @@ -72,7 +71,7 @@ fn destroy_note( // TODO(1718): Can we reuse the note commitment computed in `compute_nullifier`? nullified_commitment = compute_inner_note_hash(note_interface, note); } - assert(notify_nullified_note(storage_slot, nullifier, nullified_commitment) == 0); + assert(notify_nullified_note(nullifier, nullified_commitment) == 0); context.push_new_nullifier(nullifier, nullified_commitment) } \ No newline at end of file diff --git a/aztec/src/note/note_getter.nr b/aztec/src/note/note_getter.nr index ee40765..808f938 100644 --- a/aztec/src/note/note_getter.nr +++ b/aztec/src/note/note_getter.nr @@ -13,11 +13,9 @@ use crate::note::{ note_header::NoteHeader, note_viewer_options::NoteViewerOptions, utils::compute_note_hash_for_read_or_nullify, - utils::compute_unique_siloed_note_hash, utils::compute_inner_note_hash, utils::compute_siloed_note_hash, }; -use crate::messaging::get_commitment_getter_data::make_commitment_getter_data; use crate::oracle; use crate::types::vec::BoundedVec; @@ -34,69 +32,29 @@ fn check_note_header( assert(header.storage_slot == storage_slot); } -fn ensure_note_exists( - context: &mut PrivateContext, - storage_slot: Field, - note_interface: NoteInterface, - note: &mut Note, -) { - let saved_note = get_note_internal(storage_slot, note_interface); - - // Only copy over the header to the original note to make sure the preimage is the same. - let get_header = note_interface.get_header; - let set_header = note_interface.set_header; - let note_header = get_header(saved_note); - set_header(note, note_header); - - check_note_header(*context, storage_slot, note_interface, *note); - - let note_hash_for_read_request = compute_note_hash_for_read_or_nullify(note_interface, *note); - context.push_read_request(note_hash_for_read_request); -} - // Ensure a note's hash exists in the tree without retrieving the entire // notes via the oracle. -// Modifies the note by populating it with header info. fn ensure_note_hash_exists( context: &mut PrivateContext, - storage_slot: Field, note_interface: NoteInterface, - note: &mut Note, + note: Note, + from_public: bool, ) { - // Initialize header of note. Must be done before computing note hashes as it initializes the: - // - storage slot (used in inner note hash) - // - the contract address (used in siloed note hash) - // - and the nonce (used in the unique siloed note hash) - let set_header = note_interface.set_header; - let note_header = NoteHeader { - contract_address: (*context).this_address(), - // TODO(https://github.com/AztecProtocol/aztec-packages/issues/1386): should be - // real nonce (once public kernel applies nonces). - nonce: 0, - storage_slot - }; - set_header(note, note_header); - - // Get a note from oracle and early out if it doesn't exist. - let inner_note_hash = compute_inner_note_hash(note_interface, *note); - - let raw_oracle_ret = oracle::get_commitment::get_commitment(inner_note_hash); - let deserialized_oracle_ret = make_commitment_getter_data(raw_oracle_ret, 0); - // TODO(https://github.com/AztecProtocol/aztec-packages/issues/1386): should be - // unique_siloed_note_hash once public kernel applies nonces - let saved_siloed_note_hash = deserialized_oracle_ret.message; - - assert(saved_siloed_note_hash != 0); // TODO(dbanks12): necessary? - - check_note_header(*context, storage_slot, note_interface, *note); - - // Ensure that the note hash retrieved from oracle matches the one computed from note. - let computed_siloed_note_hash = compute_siloed_note_hash(note_interface, *note); - // TODO(https://github.com/AztecProtocol/aztec-packages/issues/1386): should be - // compute_note_hash_for_read_or_nullify once public kernel applies nonces - assert(computed_siloed_note_hash == saved_siloed_note_hash); + let get_header = note_interface.get_header; + let header = get_header(note); - context.push_read_request(computed_siloed_note_hash); + // Check the note hash via oracle and early out if it doesn't exist. + let inner_note_hash = compute_inner_note_hash(note_interface, note); + let exists = oracle::notes::check_note_hash_exists(header.nonce, inner_note_hash); + assert(exists, "Note hash does not exist."); + + let mut note_hash_for_read_request = compute_note_hash_for_read_or_nullify(note_interface, note); + if from_public { + // TODO(https://github.com/AztecProtocol/aztec-packages/issues/1386) + // Should remove this once public kernel applies nonces. + note_hash_for_read_request = compute_siloed_note_hash(note_interface, note); + } + context.push_read_request(note_hash_for_read_request); } fn get_note( diff --git a/aztec/src/oracle.nr b/aztec/src/oracle.nr index 056617e..da760ab 100644 --- a/aztec/src/oracle.nr +++ b/aztec/src/oracle.nr @@ -6,7 +6,6 @@ mod arguments; mod call_private_function; mod context; mod debug_log; -mod get_commitment; mod get_l1_to_l2_message; mod get_public_key; mod get_secret_key; diff --git a/aztec/src/oracle/get_commitment.nr b/aztec/src/oracle/get_commitment.nr deleted file mode 100644 index 2793c00..0000000 --- a/aztec/src/oracle/get_commitment.nr +++ /dev/null @@ -1,11 +0,0 @@ -// Oracle function to get a commitment, its sibling path and index, without getting its preimage. - -// commitment + index + root; -global COMMITMENT_GETTER_LENGTH = 3; - -#[oracle(getCommitment)] -fn get_commitment_oracle(_commitment: Field) -> [Field; COMMITMENT_GETTER_LENGTH] {} - -unconstrained fn get_commitment(commitment: Field) -> [Field; COMMITMENT_GETTER_LENGTH] { - get_commitment_oracle(commitment) -} diff --git a/aztec/src/oracle/notes.nr b/aztec/src/oracle/notes.nr index 52d4a44..356cf5d 100644 --- a/aztec/src/oracle/notes.nr +++ b/aztec/src/oracle/notes.nr @@ -22,17 +22,28 @@ unconstrained fn notify_created_note( #[oracle(notifyNullifiedNote)] fn notify_nullified_note_oracle( - _storage_slot: Field, _nullifier: Field, _inner_note_hash: Field, ) -> Field {} unconstrained fn notify_nullified_note( - storage_slot: Field, nullifier: Field, inner_note_hash: Field, ) -> Field { - notify_nullified_note_oracle(storage_slot, nullifier, inner_note_hash) + notify_nullified_note_oracle(nullifier, inner_note_hash) +} + +#[oracle(checkNoteHashExists)] +fn check_note_hash_exists_oracle( + _nonce: Field, + _inner_note_hash: Field, +) -> Field {} + +unconstrained fn check_note_hash_exists( + nonce: Field, + inner_note_hash: Field, +) -> bool { + check_note_hash_exists_oracle(nonce, inner_note_hash) == 1 } #[oracle(getNotes)] diff --git a/aztec/src/state_vars/set.nr b/aztec/src/state_vars/set.nr index c14eebb..698af2e 100644 --- a/aztec/src/state_vars/set.nr +++ b/aztec/src/state_vars/set.nr @@ -4,8 +4,9 @@ use crate::constants_gen::{MAX_NOTES_PER_PAGE, MAX_READ_REQUESTS_PER_CALL}; use crate::context::{PrivateContext, PublicContext, Context}; use crate::note::{ lifecycle::{create_note, create_note_hash_from_public, destroy_note}, - note_getter::{ensure_note_exists, ensure_note_hash_exists, get_notes, view_notes}, + note_getter::{ensure_note_hash_exists, get_notes, view_notes}, note_getter_options::NoteGetterOptions, + note_header::NoteHeader, note_interface::NoteInterface, note_viewer_options::NoteViewerOptions, utils::compute_note_hash_for_read_or_nullify, @@ -49,64 +50,79 @@ impl Set { ); } - fn assert_contains_and_remove(self, note: Note) { - let mut note_with_header = note; - // TODO(1386): replace with `ensure_note_hash_exists` - // once `get_commitment` works for privately created note hashes - ensure_note_exists( - self.context.private.unwrap(), - self.storage_slot, + fn assert_contains_and_remove(self, note: &mut Note, nonce: Field) { + // Initialize header of note. Must be done before computing note hashes as it initializes the: + // - storage slot (used in inner note hash) + // - the contract address (used in siloed note hash) + // - and the nonce (used in the unique siloed note hash) + let context = self.context.private.unwrap(); + let set_header = self.note_interface.set_header; + let note_header = NoteHeader{ + contract_address: context.this_address(), + storage_slot: self.storage_slot, + nonce + }; + set_header(note, note_header); + + ensure_note_hash_exists( + context, self.note_interface, - &mut note_with_header, + *note, + false, ); + destroy_note( - self.context.private.unwrap(), - self.storage_slot, - note_with_header, + context, + *note, self.note_interface, ); } // NOTE: this function should ONLY be used for PUBLICLY-CREATED note hashes! - // WARNING: function will be deprecated/removed eventually once `assert_contains_and_remove` - // works for publicly-created note hashes as well. - fn assert_contains_and_remove_publicly_created(self, note: Note) { - let mut note_with_header = note; - // Modifies note with the header which is necessary for the next step (remove). + // WARNING: function will be deprecated/removed eventually once public kernel applies nonces. + fn assert_contains_and_remove_publicly_created(self, note: &mut Note) { + // TODO(https://github.com/AztecProtocol/aztec-packages/issues/1386) + // Should be real nonce (once public kernel applies nonces). + let nonce = 0; + let context = self.context.private.unwrap(); + let set_header = self.note_interface.set_header; + let mut note_header = NoteHeader{ + contract_address: context.this_address(), + storage_slot: self.storage_slot, + nonce + }; + set_header(note, note_header); + ensure_note_hash_exists( - self.context.private.unwrap(), - self.storage_slot, + context, self.note_interface, - &mut note_with_header, + *note, + true, ); - let get_header = self.note_interface.get_header; - let set_header = self.note_interface.set_header; - let mut header = get_header(note); // Set the nonce to nonzero so that the nullifier is treated as persistable // (non-transient) and so the private kernel does not attempt to match it to // a pending noteHash/commitment and squash them. // TODO(https://github.com/AztecProtocol/aztec-packages/issues/1386): remove // this hack once public kernel injects nonces. - header.nonce = 1; - set_header(&mut note_with_header, header); + note_header.nonce = 1; + set_header(note, note_header); + destroy_note( - self.context.private.unwrap(), - self.storage_slot, - note_with_header, + context, + *note, self.note_interface, ); } fn remove(self, note: Note) { + let context = self.context.private.unwrap(); let note_hash = compute_note_hash_for_read_or_nullify(self.note_interface, note); - let read_requests = self.context.private.unwrap_unchecked().read_requests; - let has_been_read = read_requests.any(|r| r == note_hash); + let has_been_read = context.read_requests.any(|r| r == note_hash); assert(has_been_read, "Can only remove a note that has been read from the set."); destroy_note( - self.context.private.unwrap(), - self.storage_slot, + context, note, self.note_interface, ); diff --git a/aztec/src/state_vars/singleton.nr b/aztec/src/state_vars/singleton.nr index e103360..6b7afcb 100644 --- a/aztec/src/state_vars/singleton.nr +++ b/aztec/src/state_vars/singleton.nr @@ -56,7 +56,7 @@ impl Singleton { let prev_note = get_note(context, self.storage_slot, self.note_interface); // Nullify previous note. - destroy_note(context, self.storage_slot, prev_note, self.note_interface); + destroy_note(context, prev_note, self.note_interface); // Add replacement note. create_note(context, self.storage_slot, new_note, self.note_interface); @@ -67,7 +67,7 @@ impl Singleton { let mut note = get_note(context, self.storage_slot, self.note_interface); // Nullify current note to make sure it's reading the latest note. - destroy_note(context, self.storage_slot, note, self.note_interface); + destroy_note(context, note, self.note_interface); // Add the same note again. // Because a nonce is added to every note in the kernel, its nullifier will be different. diff --git a/safe-math/src/safe_u120.nr b/safe-math/src/safe_u120.nr index ccb6ab9..5feeb3c 100644 --- a/safe-math/src/safe_u120.nr +++ b/safe-math/src/safe_u120.nr @@ -259,11 +259,10 @@ fn test_mul_div_up_ghost_overflow() { // It should not be possible for us to overflow `mul_div_up` through the adder, since that require the divisor to be 1 // since we otherwise would not be at the max value. If divisor is 1, adder is 0. - #[test(should_fail)] fn test_mul_div_up_zero_divisor() { let a = SafeU120::new(6); let b = SafeU120::new(3); let c = SafeU120::new(0); let _d = SafeU120::mul_div_up(a, b, c); -} \ No newline at end of file +}